package think.thread.c02;

import java.util.ArrayList;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;

class TaskWithResult implements Callable<String>{
	int id;
	TaskWithResult(int id){
		this.id=id;
	}
	public String call(){
		return "result of TaskWithResult "+id;
	}
}
public class CallableDemo {
	public static void main(String[] args) {
		ExecutorService exec=Executors.newCachedThreadPool();
		ArrayList<Future<String>> results=new ArrayList<Future<String>>();
		for(int i=0;i<10;i++){
			results.add(exec.submit(new TaskWithResult(i)));
		}
		for(Future<String> fs:results){
			try {
				System.out.println(fs.get());
			} catch (Exception e) {
				e.printStackTrace();
			}finally{
				exec.shutdown();
			}
		}
	}
}
